Managing personal Outlook.com account settings, security, and privacy
Hello,
According to the Microsoft Account Activity Policy here, if you haven't signed in with your Microsoft account for more than 2 years, your account will be put into an inactive state and will be permanently closed. You cannot even use the 'Account Recovery' form here to recover your account.
Reference article -
Microsoft account activity policy
As Microsoft no longer recycles email addresses, you can’t recreate the same Microsoft account with that email address again. If that were possible, someone else may already have taken it. To prevent that, the email address will not be available to anyone in the future.